摘要：

用三氯化铝滴碱法和铝酸钙酸溶一步法，分别制备了纯聚合氯化铝(PAC)和含钙的聚合氯化铝(CaPAC)，对两种聚合铝的盐基度、铝的形态分布、混凝性能等进行了对比研究。采用Ferron逐时络合比色法对具有不同盐基度的PAC、CaPAC中的Al_a、Al_b和Al_c形态分布进行了分析检测，并用烧杯试验方法考察了PAC、CaPAC对模拟水样和实际水样的混凝除浊性能。结果表明，PAC、CaPAC在对不同水样进行混凝处理后，水中余浊随两种聚合铝盐基度的增加而降低，余浊与盐基度表现出较好的相关性;在相同加药量条件下，CaPAC混凝除浊效果略好于PAC。另外，研究表明,Al_b或Al_c的形态分布与混凝除浊性能之间,未表现出明显的相关性。

关键词: 含钙聚合氯化, 聚合氯化铝, 盐基度, 混凝剂

Abstract:

Polyaluminiumchloride(PAC) and polyaluminiumchloride containing calcium(CaPAC) with differentbasicities have been synthesized byusing the method of microinjection of base and the one-step method ofdissolving the calciumaluminate with the hydrochloricacidre spectively. The effect of the basicity of PAC andCaPA Conalulminium species(i.e.Al_a, Al_b and Al_c)and coagulative propertiesisre searched. The speciesdistri but ionof aluminiuminPACandCaPACare analyzedbyusingthe methodof Al-Ferroncomplextimedcolorimetricprocess. The coagulative properties of PAC and CaPAC aree xplored by using the jar test.The experimental resultsshow that the residual turbidityin treatedwater decreases with the increase of basicity of PAC and CaPAC. Thecoagulativepropertyof CaPACisbetter thanPACunder thesamedosageandbasicity. Inaddition, it isfoundthat there isnot obvious linerelation between the species distri but ionofaluminium(i.e. Al_b and Al_c) and thecoagulative property of PAC and CaPAC.

Key words: polyaluminium chloride containing calcium, polyaluminium chloride, basicity, coagulant

中图分类号: 

• TQ314.253